Downtown Louisville can be described as the biggest CBD, i.e. central business district located in Kentucky, US. It’s divided in to 5 major areas; inclusive of West Main District, East Main District, Medical Center, Fourth Street District, and Civic Center. The ‘tallest’ constructions all over Kentucky would be found in Downtown Louisville. Moreover, they are inclusive of AEGON Center that has been designed by John Burgee, Harrison and Abramovitz’s National City Tower, Welton Becket’s PNC Plaza, and Michael Graves’s Humana Building. Downtown is the most ancient portion of Louisville; initial development of which had been closely tied up with Ohio River.